1378377140 has 24 divisors (see below), whose sum is σ = 3308105472. Its totient is φ = 472586400.

The previous prime is 1378377109. The next prime is 1378377151. The reversal of 1378377140 is 417738731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922636 + ... + 4922915.

It is an arithmetic number, because the mean of its divisors is an integer number (137837728).

Almost surely, 2^1378377140 is an apocalyptic number.

1378377140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378377140 is an abundant number, since it is smaller than the sum of its proper divisors (1929728332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378377140 is a wasteful number, since it uses less digits than its factorization.

1378377140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9845567 (or 9845565 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 1378377140 is about 37126.5018551439. The cubic root of 1378377140 is about 1112.8996878897.

The spelling of 1378377140 in words is "one billion, three hundred seventy-eight million, three hundred seventy-seven thousand, one hundred forty".